They will work at first if the keyboard has just been turned on, but after a while they cut in and out. I’ll hit the key hard and get no sound, I’ll hit it again and get a quite sound, I’ll hit it again and it will play fine, I’ll hit it again….you get it. Does anyone know what part needs to be replaced to fix this?
Quick update**
Now the F# and C keys are having issues.
there is an issue on one of the keyswitch (MK) boards….Could be corrosion from s spillage. Best replace the MK boards
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YamahaPart numbers ZZ150101 , Wf212502, and WF212802.
You might consider replacing the rubber contacts also, although the issue you have is not related to the rubbers, they can be reused if they look ok. Be careful reinserting the ribbon cables to make sure they are “seated” properly.
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Appreciate the replies, thank you!